JP2000167003A - Chair - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a chair with a headrest attached to the backrest slantable in the upper/lower direction or in the front/rear direction to prevent or recover from fatigue of the neck, etc. SOLUTION: The chair main body 10 has a seat 11 and a backrest 12 attached to the rear of the seat 11, and a headrest 50 for supporting a user's head is attached to the upper part of the backrest 12 rotatably in the upper/ lower directions. The headrest 50 has a clasping air bag 25 (clasping means) for clasping the head and a push-up air bag 25 (drive means) for moving the headrest 50 in the upper/lower directions. A user's neck is stretched as the headrest 50 is moved in the upper/lower directions by the push-up air bag 24 with the head being clasped by the clasping air bag 25, so that fatigue in the user's neck will be prevented or the user will recover from the fatigue.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a chair having a headrest that supports a head and prevents fatigue of a neck and the like.

[0002]

2. Description of the Related Art Conventionally, chairs having a chair body (hereinafter simply referred to as a body) composed of a seat portion and a backrest portion, which are used for various purposes, are used for driving a car for a long time, office work (for example, personal work). Various measures have been taken to prevent the occurrence of fatigue of a sitting person, that is, a seated person when sitting for a long time as in the case of a continuous input operation of a computer.

[0003] For example, as shown in FIG.
The airbags 303 and 304 are disposed on the seat 301 and the backrest 302, respectively, and the air hoses 305 and 306 are attached to the airbags 303 and 304, respectively.
Air supply / exhaust device 30 provided in the armrest 307 through the
The air is supplied from 8 to inflate it to increase the cushioning property to prevent the occurrence of fatigue, and to expand and contract to stimulate the buttocks or lower back muscles to recover the fatigue that has occurred. Have been.

[0004] A headrest 310 for supporting the head above the seat 302 to prevent fatigue of the neck.
Is provided.

In addition, when sitting for a long period of time, the accumulation of fatigue in the neck as well as the accumulation of fatigue in the waist and the like causes not only muscle fatigue such as stiff shoulders but also eye fatigue. While preventing the occurrence of neck fatigue,
Eliminating or recovering from this fatigue is important from the viewpoints of health and preventing a decrease in work efficiency.

However, in the above-mentioned conventional chair, the headrest 310 is provided on the upper part of the backrest 302 to support the head. It cannot be recovered.

[0007]

As described above, the conventional chair is provided with the headrest 310 on the backrest 302,
Although it has a function of preventing the occurrence of fatigue at the neck and the like when seated for a long time, it cannot recover the generated fatigue.

[0008]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an invention according to claim 1 comprises a chair body having a seat and a backrest provided behind the seat. A headrest disposed above the backrest portion so as to be vertically movable and supporting a head, a holding means provided on the headrest for holding the head, and a headrest disposed on the backrest portion to move the headrest in a vertical direction. The chair is provided with a driving unit, and a headrest whose head is held by the holding unit is moved up and down by the driving unit to extend a neck and the like.

As described above, according to the first aspect of the present invention, there is provided a chair body having a seat portion and a backrest provided behind the seat portion, and a head arranged to be vertically movable above the backrest portion. , A headrest provided on the headrest, and holding means for holding the head, and a driving means disposed on the backrest portion for moving the headrest in a vertical direction, wherein the headrest holds the head by the holding means. Is moved up and down by the driving means to stretch the neck and the like, so that it is possible to prevent the occurrence of fatigue of the neck, and to stretch the neck to stimulate muscles, remove congestion, promote blood circulation, and promote stiffness. It has the effect of being able to recover fatigue caused by loosening and the like.

According to a second aspect of the present invention, the holding means according to the first aspect of the present invention is arranged on the left and right sides of the head support surface of the headrest, and expands and contracts by supplying air from an air supply / exhaust device. The chair is formed by an airbag that holds the head by holding surfaces approaching each other.

As described above, according to the second aspect of the present invention, the holding means of the first aspect of the present invention is arranged on the left and right sides of the head support surface of the headrest, and is expanded by supplying air from an air supply / exhaust device. Since the air bag is formed by an air bag that clamps the head with the clamping surfaces that are shrunk and approach each other, in addition to the operation of the invention according to claim 1, the clamping of the head is performed when the clamping surface of the air bag is on the peripheral surface of the head. Since it is fit, that is, it is sandwiched along the circumference of the head, it is so-called softly sandwiched, so that it has an effect of causing no pain or the like.

According to a third aspect of the present invention, there is provided a chair body having a seat portion and a backrest portion provided behind the seat portion, and a head disposed above the backrest portion so as to be tiltable in the front-rear direction. A headrest for supporting the headrest, and a driving means disposed on the backrest for tilting the headrest. The headrest supporting the head is tilted in the front-back direction by the driving means to tilt the neck and the like back and forth. It is a chair like this.

According to the third aspect of the present invention, there is provided a chair body having a seat portion and a backrest provided behind the seat portion, and is disposed above the backrest so as to be tiltable in the front-rear direction. A headrest for supporting the head, and a driving unit disposed on the backrest for tilting the headrest, wherein the headrest supporting the head by the driving unit is tilted in the front-back direction to tilt the neck and the like back and forth. As a result, fatigue of the neck can be prevented, and by tilting the neck forward and backward, muscles are stimulated to remove congestion, promote blood circulation, and reduce fatigue caused by relaxing stiffness. It has the effect of being able to recover.

According to a fourth aspect of the present invention, there is provided a chair body having a seat portion and a backrest provided behind the seat portion, and a head which is vertically movably disposed above the backrest portion. A headrest to be supported, and a pair of airbags arranged at left and right portions of the head supported by the headrest and inflated and contracted by air supply and exhaust from an air supply and exhaust device, the pair of airbags The chair is designed to be expanded and contracted alternately so that the neck and the like are twisted to the left and right.

As described above, the invention according to claim 4 provides a chair body having a seat portion and a backrest portion provided behind the seat portion, and a head portion which is vertically movably disposed above the backrest portion. And a pair of airbags arranged at left and right portions of the head supported by the headrest and inflated and contracted by air supply and exhaust from an air supply and exhaust device, the pair of airbags By alternately expanding and contracting to twist the neck etc. to the left and right, it is possible to prevent the occurrence of fatigue at the neck and to twist the neck to the left and right to stimulate muscles, remove congestion and improve blood circulation. It has the effect of accelerating and easing stiffness to recover fatigue that has occurred.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a first embodiment of the present invention, that is, an embodiment in which a headrest is moved up and down will be described with reference to FIGS.

As shown in FIG. 1, the chair 1 comprises a chair body (hereinafter referred to as a body) comprising a seat 11, a backrest 12 provided at the rear of the seat 11, and armrests 13 provided on the left and right sides of the seat 11. And a headrest 50 disposed above the backrest 12.

The seat 11 is provided with an air bag 20 for the butt portion. When the air bag 20 functions as a cushion, it is supplied with air from an air supply / exhaust device 30 to be described later. Inflated to the state of
In addition, expansion and contraction are repeated when massaging the buttocks.

The backrest portion 12 is provided with a waist airbag 21 and a back airbag 22, and these airbags 21 and 22 function as cushions, similarly to the hip airbag 20. At this time, air is supplied from the air supply / exhaust device 30 to inflate it to a desired state, and when massaging the waist and back, expansion and contraction are repeated.

Also, as shown in FIG.
The air supply / exhaust device 30 is housed inside the air supply device. The air supply / exhaust device 30 includes, as shown in FIG. A distributor 32 for distributing air to each air bag, which is composed of a rotary valve connected by an air hose 40), a first on-off valve 33 composed of a solenoid valve connected by a hose 41, and a hose 42 connected. A second on-off valve 34 composed of a solenoid valve, and an air generating means 31, a distributor 32, and a control means 35 for controlling the first on-off valve 33 and the second on-off valve 34.

The control means 35 controls the air generating means 31 and the distributor 3 in accordance with each mode set from an operation panel 36 provided on the upper surface of the armrest 13.
2. The first on-off valve 33 and the second on-off valve 34 are controlled to execute the set mode. The modes include a mode in which the hip airbag 20, the waist airbag 21, and the back airbag 22 are operated individually or simultaneously, and a vertical mode in which the headrest 50 is moved up and down (this vertical mode is used). In this case, the amount of vertical movement can be adjusted by adjusting the amount of air supplied.) In addition, a pinching mode in which a pinching operation of the pinching airbag 25 described later is performed, and a pinching airbag 25 is alternately performed. And a twisting mode in which the neck is twisted by expanding and contracting. The operation panel 36 is provided with various operation buttons 36a such as a start button.

The tail airbag 20, the waist airbag 21 and the back airbag 22 are connected to the air supply / exhaust device 30, that is, the distributor 32, by hoses 43, 44 and 45, respectively. The rear airbag 21, the waist airbag 21, and the back airbag 22 are provided with the air generating means 3 operated under the control of the control means 35.
1. Air is supplied and exhausted by a distributor 32 according to a predetermined order to expand and contract, and the expansion and contraction presses the buttocks, waist and back, thereby performing massage.

When the tail airbag 20, the waist airbag 21 and the back airbag 22 are used as cushions, a predetermined amount of air is supplied and inflated so that the inflated state is maintained. Has become.

Next, the headrest 50 arranged above the backrest 12 will be described. As shown in the figure, the headrest 50 includes a rest portion 51 having a curved surface on the front side, that is, a surface supporting the head, and a pair of support members 52 supporting the rest portion 51. . When the headrest 50 is attached to a support frame 60 to be described later,
It passes through a through hole 12b formed in the upper end surface of the backrest 12, and a support shaft 53 is integrally fixed to the lower end by welding.

As shown in FIG. 2, a pair of substantially square receiving plates 54 arranged so that the center of the support rod 52 is aligned with the center of the support rod 52 are fixed to the lower side of the support shaft 53 by welding. Have been. In addition, both side surfaces 54 before and after the receiving plate 54
“a” functions as a guide surface for moving the support rod 52 in the vertical direction while maintaining the support rod 52 in the axial direction.

Next, as shown in FIG.
The support frame 60 which is attached to the frame body 12a by screws or the like (not shown) and to which the headrest 50 is attached so as to be movable in the vertical direction will be described.

As shown in FIG. 2, the support frame 60 includes a bottom plate 61, a front wall 62, a rear wall 63, and left and right side walls 64 integrally formed with the bottom plate 61, and a bottomed box-like shape having an open upper side. Is formed. The left and right side walls 64 are formed with slit-like guide holes 65 formed along the up-down direction and through which the support shaft 53 is slidably penetrated.

The headrest 50 is provided on the support frame 60 at the lower end of the support rod 52.
The headrest 50 is vertically movable with respect to the support frame 60 in the mounted state.

When the headrest 50 is attached to the support frame 60, the headrest 50 is formed between the receiving plate 54 and the bottom plate 61 of the support frame 60 so as to be formed in a bellows shape, and to allow air to flow therethrough. A push-up airbag 24, which expands and contracts in the axial direction, that is, the vertical direction due to air supply and exhaust, and moves the headrest 50 upward, is mounted with the upper end surface thereof positioned on the receiving plate 54 and the lower end surface thereof positioned on the bottom plate 61. ing.

At both ends of the support shaft 53, a coil spring 56 for urging the support shaft 53 downward is provided with a locking piece 6 having a lower end formed on the bottom plate 61.
1a. This coil spring 56
Functions to move the headrest 50 downward as the lifting airbag 24 contracts.

The lifting air bag 24, the air generating means 31, which supplies air to the lifting air bag 24, the first opening / closing valve 33, and the coil spring 56 constitute a driving means for moving the headrest 50 up and down. Is what you are doing.

One end of a hose 46a is connected to the lower end surface of each of the push-up air bags 24, and the other end of the hose 46a is combined into a single hose 46 to form the first open / close valve 33. It is connected to the.

The air bag 24 for both push-ups
In the meantime, when air is supplied from the air supply / exhaust device 30, that is, the air generation means 31 via the first opening / closing valve 33,
The headrest 50 is gradually extended with the supply of the air, and is pushed up, that is, moved upward through the receiving plate 54 attached to the support shaft 53 with the extension.

During this movement, the front and rear side surfaces 54a of the receiving plate 54 move while sliding on the inner surfaces of the front wall 62 and the rear wall 63 of the support frame 60, so that the support shaft 53 serves as a pivot point. Rotation in the front-rear direction is restricted, and since both push-up airbags 24 extend simultaneously, they do not rotate in the left-right direction. Therefore, the support rod 52 does not rotate in the left-right front-rear direction. That is, the headrest moves upward, and the headrest 50 also moves upward.

Next, a predetermined amount of air is supplied, and the air bag 24 for pushing up has a predetermined length (the predetermined length is set to a desired amount by the setting means provided on the operation panel. When extended, the control means 35 controls the first opening / closing valve 33 to open so that the air in the push-up air bag 24 is exhausted.

When the first on-off valve 33 is opened, the air in the push-up air bag 24 is gradually exhausted, and the push-up air bag 24 gradually contracts and its length is reduced. With the contraction, as described above, the headrest 50 is pulled down by the coil spring 56 and moves downward. Then, when the push-up air bag 24 contracts to the initial state, the control means 35 controls the first opening / closing valve 33 so as to supply air to the push-up air bag 24 again.

As described above, the headrest 50 moves up and down with respect to the upper end of the backrest 12 by repeatedly supplying and exhausting air to and from the push-up airbag 24 under the control of the control means 35.

The amount of upward movement of the headrest 50 relative to the upper end of the backrest portion 12 is detected by a method of detecting the pressure in the air bag 24 for pushing up by a pressure sensor, and the amount of supplied air is proportional to the supply time. The method may be performed by any of a method of measuring the supply time from the time and detecting the amount of movement of the headrest 50 by a position sensor, and the like.

As shown in FIG. 2, a pair of holding airbags 25 are mounted on the front surface of the headrest 50 on the left and right sides of the center of the headrest 50 with the mounting portion 26 at the center. One end of a hose 47 is connected to each of the air bags 25, and the other end of the hose 47 is connected to the second on-off valve 34. The second on-off valve 34 functions so as to supply and exhaust air to and from the two airbags 25 simultaneously or alternately to supply and exhaust air.

The air bag 25 for pinching
When the air is simultaneously supplied and exhausted by the second on-off valve 34 controlled by the control means 35 and expands and contracts, when the air expands, the head resting the back of the head on the headrest 50, that is, both chins of the face The part is pinched from the side.

Then, with the holding air bag 25 inflated and the head held, the air bag 2 for pushing up is held.
By supplying and exhausting air to 4, the neck is lengthened, the muscles are stimulated, congestion is removed, blood circulation is promoted, stiffness is relaxed, and fatigue can be recovered.

Since the head is held by the holding air bag 25, both jaws can be softly held from the side, so that no pain or the like occurs when the head is held. is there.

Next, the operation of the headrest 50 of the chair will be described. First, the operation of moving the headrest 50 up and down to extend the neck will be described.

The user sits on the seat 11 and adjusts the amount of movement of the headrest 50 from the operation panel 36 (set by setting the amount of air supply determined according to the amount of movement previously from the operation panel 36). Set the desired value and set the vertical movement mode.
5 is set to simultaneously inflate. At this time, the air bag 20 for the hips and the air bag 2 for the waist are used.
1. When operating the back airbag 22, the operating conditions are set.

Then, the back is rested on the backrest portion 12 and the back of the head, that is, the back of the head is brought into contact with the headrest 50. Then, an operation button (not shown) for operating the holding air bag 25 is operated to operate the two holding bags 25. To inflate the head.

Next, the start button is operated. When the start button is operated, the air generating means 31, the distributor 32, and the first opening / closing valve 33 are controlled by the control of the control means 35, and air is supplied to and exhausted from the push-up air bag 24 to expand and contract. This expansion causes the air bag 24 for pushing up.
Expands and contracts, and the headrest 50 moves up and down. When the headrest 50 moves upward, the head held by the two airbags 25 is pushed upward, and the neck is extended. By repeating this operation, as described above, the neck is stretched and the muscles such as the neck are stimulated, congestion is removed, blood circulation is promoted, stiffness is relaxed, and fatigue can be recovered.

Next, the operation of twisting the neck part right and left will be described. In this case, the user sits down on the seat portion 11 and, from the operation panel 36, puts the headrest 50 in a state in which the headrest 50 is not operated, that is, in a stopped state.
Set the twisting mode in which is alternately operated. Then, the user leans the back on the backrest 12 and places the back of the head on the headrest 50 to operate the start button. Then, since the holding airbag 25 expands and contracts alternately,
The head is swung left and right and the neck is twisted left and right in accordance with the inflation of the air bag 25 for pinching. By twisting the neck in the left and right direction, muscles such as the neck are stimulated to remove congestion and blood circulation. It is promoted, and the fatigue caused by loosening stiffness can be recovered.

In the above embodiment, the holding means is constituted by a pair of holding airbags 25. However, the holding means is not limited to an airbag. One end of each of the holding members is rotatably attached to the center of the front surface of the headrest 50, and is always opened to be positioned along the front surface of the headrest 50. Alternatively, the head may be pinched.

Next, a second embodiment of the present invention, that is, an embodiment in which the headrest is tilted back and forth will be described with reference to FIGS. In addition, the main body 1 of this embodiment
Since the configurations of the headrest 0 and the headrest 50 are the same as those of the above-described embodiment, the same portions are denoted by the same reference numerals and description thereof will be omitted.

As shown in FIG. 5, the support frame 160 is
61, a front wall 162 integrally formed with the bottom plate 161;
The rear wall 163 and the left and right side walls 164 are formed in a box shape with a bottom and open at the top.
4 are each formed with a shaft hole 165.

Further, as shown in FIG.
A support plate 155 is provided on the support shaft 53 by welding in such a manner that the support plate 155 hangs downward in an extension of the axis of the support rod 52.
On the front and rear side surfaces of the support plate 155, tilting airbags 27 for tilting the headrest 50 in the front and rear direction, that is, rotating the support shaft 53 with the support shaft 53 as a fulcrum, are attached. This tilting air bag 27
As shown in FIGS. 5 and 6, the two airbags 27a which are flat in the contracted state are overlapped, and the upper end edge is attached to the support plate 155 by the fixture 28. Also, the two air bags 27a
Communicate with each other inside the upper end side.

One end of a hose 48 is connected to each of the outer air bags 27a of the two air bags 27a, and the other end of the air hose 48 is connected to a solenoid valve as shown in FIG. On-off valve 37 consisting of
The on-off valve 37 is connected to the air generating means 31 via a hose 49.

The tilting air bag 27, the air generating means 31, and the opening / closing valve 37 constitute driving means for tilting the headrest 50. Further, since the configuration of the air generating device 30 is the same as that of the above-described embodiment, that is, the configuration shown in FIG. 4, the same portions are denoted by the same reference numerals and description thereof will be omitted.

In this embodiment, a tilt mode for tilting the headrest 50 in the front-rear direction is provided, and the operation panel 36 is provided with an operation button (not shown) for setting the tilt mode.

The headrest 50 is mounted on the support frame 160 by supporting both ends of the support shaft 53 in the shaft hole 165. The headrest 50 is mounted on the support plate 155 in the mounted state. When the tilting airbag 27 is in a contracted state, a gap is formed between the outer airbags 27a and the front wall 162 and the rear wall 163 of the support frame 160 as shown in FIG. It has become.

The tilting air bag 27 is
When the tilt mode is set, air is supplied and exhausted by the control means 35 so that the air is alternately expanded and contracted.
Is pivoted back and forth, that is, tilted, with the pivot point as a pivot point. That is, the air generating device 31 and the opening / closing valve 37 are controlled by the control of the control means 35, and air is supplied to one side, that is, the front tilting air bag 27, and the other side, that is, the rear tilting air bag 27 is exhausted. Since the airbag 27 is contracted, the support plate 155 rotates counterclockwise in FIG. 6 with the support shaft 53 as a fulcrum, and the headrest 50 falls forward with the inflation of the tilting airbag 27 on the front side.

Next, when the air in the front tilting air bag 27 is exhausted and the supply of the air to the rear tilting air bag 27 is started, the air gradually inflates with the supply and the air expands. The support plate 155 is the support shaft 5
6, the headrest 50 pivots clockwise in FIG.

As described above, the headrest 50 can be tilted back and forth by alternately supplying and exhausting air to the tilting air bags 27, and the head can be tilted back and forth. When the muscles such as the neck are stretched, the blood is stimulated to remove congestion, blood circulation is promoted, and stiffness is relaxed.

When the headrest 50 functions only as a headrest, the tilting airbag 27 has a function of adjusting the amount of air supplied to the front and rear tilting airbags 27 to adjust the tilting angle. Things.

In the second embodiment,
The backrest portion 12 is provided so as to be reclineable. When the headrest 50 is tilted in the front-rear direction, the headrest 50 is also tilted rearward by tilting the backrest portion 12 rearward. Because the weight of the head can be used, the headrest
Since the neck portion is bent in a relaxed state while being placed on zero, fatigue recovery can be more effectively achieved.

Next, a third embodiment of the present invention, ie, a mode in which the headrest is tilted while moving up and down, is shown in FIG.
A description will be given with reference to FIG. This embodiment is basically the same as the first embodiment with the addition of the tilting airbag of the second embodiment, and the same reference numerals are used for the same parts as the above embodiments. The description is omitted here.

As shown in FIG. 9, a support plate 155 is attached by hanging downward at the intermediate portion of the support shaft 53, that is, between the two receiving plates 54, and a tilting air bag 27 is provided on both front and rear sides of the support plate 155. Installed.

As shown in FIG. 9, between the side surfaces 54a of the receiving plate 54 and the front wall 62 and the rear wall 63 of the supporting frame 60, when the receiving plate 54 rotates together with the support shaft 53 as shown in FIG. A gap is formed so that the lower corner portion 54b of the 54 does not interfere with the front wall 62 and the rear wall 63. In other words, the rotation trajectory K passing through the lower corner 54b of the receiving plate 54 that rotates with the support shaft 53 as a rotation fulcrum has a relationship that does not interfere with the front wall 62 and the rear wall 63.

In this embodiment, there are provided a vertical movement mode in which the headrest 50 is moved up and down, a tilting mode in which the headrest 50 is tilted back and forth, and a simultaneous mode in which the headrest 50 is tilted while being moved up and down. When set from the panel 36, the control means executes the set mode. In the vertical movement mode in which the headrest 50 is moved up and down, air is supplied and exhausted only to the push-up airbag 24 without operating the tilting airbag 27. As in the case described above, the headrest 50 can be moved in the vertical direction to extend the neck through the head held by the holding airbag 25, thereby recovering fatigue of muscles such as the neck.

In this case, when the headrest 50 moves in the vertical direction, the outside of the tilting airbag 27 is formed by the front wall 62 and the rear wall 63 so as not to tilt in the front-back direction.
Inflate to the extent that it comes into sliding contact with. This allows the headrest 50 to be supported by the support rod 5 without tilting in the front-rear direction.
2 will move in the axial direction.

Next, in the case of the tilting mode in which the headrest 50 is tilted in the front-rear direction, the airbag 24 for pushing up is used.
Without operating the air bag 27, the headrest 50 is tilted back and forth as in the second embodiment by alternately supplying and exhausting air to both tilting airbags 27, and the neck supported by the headrest 50 is moved back and forth. It can be bent to recover fatigue of muscles such as the neck.

When the tilting airbags 27 are inflated and contracted, a twisting force is applied to the pushup airbags 24, but the pushup airbags 24 are deformed by their own elastic force.

When the user attempts to adjust the height position of the headrest 50 in accordance with the position of his or her own head, air is supplied to the lifting air bag 24 until the headrest 50 is at a desired position. The height can be adjusted.

In the case of the simultaneous mode in which the headrest 50 is moved up and down and tilted in the front-rear direction, air is supplied to and exhausted from the push-up air bag 24 while the air supply and exhaust are alternately supplied to the tilting air bags 27. Then, the headrest 50 tilts back and forth while moving up and down. As a result, the neck can be tilted while being stretched, so that the fatigue of muscles such as the neck can be more effectively recovered.

In each of the above-described embodiments, the driving means for vertically moving the headrest 50 is provided by the air bag 24 for pushing up, the air generating means 31 for supplying air to the air bag 24 for pushing up, and the first means. The driving means for tilting the headrest 50 is constituted by the on-off valve 33 and the coil spring 56 (first and third embodiments), and the tilting airbag 27, the air generating means 31, and the on-off valve 37 (the Embodiment 2),
These may be constituted by racks and gears that mesh with gears provided on the rotating shaft of the electric motor.

In the above embodiment, the support frames 60 and 160 are formed in a box shape with a bottom. However, the support frames may be formed of, for example, an angle member.

[0072]

As described above, according to the first aspect of the present invention, there is provided a chair body having a seat portion and a backrest portion provided behind the seat portion, and a vertically movably disposed above the backrest portion. A headrest provided to support the head, holding means provided on the headrest for holding the head, and driving means disposed inside the backrest for moving the headrest in the vertical direction. The headrest holding the portion is moved up and down by the driving means to extend the neck and the like, so that it is possible to prevent the occurrence of fatigue of the neck and to stretch the neck to stimulate muscles, remove congestion and remove blood circulation. It has the effect of accelerating and relieving fatigue caused by loosening stiffness.

According to a second aspect of the present invention, the holding means according to the first aspect of the present invention expands and contracts by supplying air from an air supply / exhaust device disposed on the left and right sides of the head support surface of the headrest to approach each other. Since the head is formed by the air bag which holds the head by the holding surface to be held, in addition to the effect of the invention according to claim 1, the holding of the head is performed by fitting the holding surface of the air bag to the peripheral surface of the head, that is, the head. Since it is sandwiched along the circumferential surface, it is so-called softly sandwiched, so that it has the effect of not causing pain or the like.

According to a third aspect of the present invention, there is provided a chair body having a seat portion and a backrest provided behind the seat portion, and a head disposed above the backrest so as to be tiltable in the front-rear direction. A headrest for supporting the headrest, and a driving unit disposed inside the backrest unit for tilting the headrest. The headrest supporting the head by the driving unit is tilted in the front-rear direction to tilt the neck and the like. In addition to preventing neck fatigue, tilting the neck back and forth stimulates muscles, removes congestion, promotes blood circulation, and relieves fatigue caused by loosening stiffness. It has the effect of being able to make it.

The invention according to a fourth aspect of the present invention provides a chair body having a seat and a backrest provided behind the seat, and a head which is vertically movably disposed above the backrest. A headrest to be supported, and a pair of airbags arranged at left and right portions of the head supported by the headrest and inflated and contracted by air supply and exhaust from an air supply and exhaust device, the pair of airbags By alternately expanding and contracting and twisting the neck etc. to the left and right, it is possible to prevent the occurrence of fatigue at the neck and to twist the neck left and right to stimulate muscles, remove congestion and promote blood circulation And has the effect of relieving fatigue caused by loosening stiffness.

[Brief description of the drawings]

FIG. 1 is a perspective view of a chair according to a first embodiment of the present invention.

FIG. 2 is a perspective view showing a mounting structure of a headrest of the chair.

FIG. 3 is a cross-sectional view (a cross-sectional view taken along line AA in FIG. 2) illustrating a mounting structure of a headrest of the chair.

FIG. 4 is a control block diagram of the chair.

FIG. 5 is a perspective view showing a mounting structure of a headrest of a chair according to a second embodiment of the present invention.

FIG. 6 is a cross-sectional view (a cross-sectional view taken along line AA in FIG. 5) illustrating a mounting configuration of the headrest according to the second embodiment.

FIG. 7 is a control block diagram of a chair according to a second embodiment of the present invention.

FIG. 8 is a perspective view showing a mounting structure of a headrest of a chair according to a third embodiment of the present invention.

FIG. 9 is a cross-sectional view (a cross-sectional view taken along line AA in FIG. 8) illustrating a mounting configuration of the headrest according to the third embodiment.

FIG. 10 is a perspective view of a conventional chair.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Chair 10 Chair main body 11 Seat part 12 Backrest part 24 Airbag for pushing up (part of drive means) 25 Airbag for holding (holding means) 27 Airbag for tilting (part of drive means) 30 Air supply / exhaust device 31 Air generating means (part of driving means) 33 First opening / closing valve (part of driving means) 37 Opening / closing means (part of driving means) 50 Headrest 56 Coil spring (part of driving means)

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) B60N 2/48 B60N 2/48

Claims (4)

[Claims] 1. A chair body having a seat and a backrest provided behind the seat, a headrest disposed above the backrest so as to be vertically movable and supporting a head,
A headrest provided on the headrest; and a driving unit disposed on the backrest for moving the headrest in a vertical direction. The headrest holding the head by the holding unit is moved up and down by the driving unit. A chair characterized in that the neck is extended by moving the chair. 2. The holding means according to claim 1, wherein the holding means is arranged on the left and right sides of the head support surface of the headrest, and is held by a holding surface which expands and contracts by air supply from an air supply / exhaust device and approaches each other. A chair formed by an airbag sandwiching a part. 3. A chair body having a seat and a backrest provided behind the seat, a headrest disposed above the backrest so as to be tiltable in the front-rear direction and supporting a head, A driving means disposed on a backrest for tilting the headrest, wherein the headrest supporting the head is tilted in the front-back direction by the driving means to tilt the neck and the like back and forth. Chair. 4. A chair body having a seat and a backrest provided behind the seat, a headrest disposed above the backrest so as to be vertically movable and supporting a head,
A pair of airbags arranged at left and right sides of the head supported by the headrest and inflated by air supply and exhaust from an air supply and exhaust device, and the pair of airbags are alternately inflated and contracted. A chair characterized by twisting the neck and the like in the left and right directions.